CN112332704A - Self-powered monitoring rolling bearing - Google Patents
Self-powered monitoring rolling bearing Download PDFInfo
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- CN112332704A CN112332704A CN202011274383.3A CN202011274383A CN112332704A CN 112332704 A CN112332704 A CN 112332704A CN 202011274383 A CN202011274383 A CN 202011274383A CN 112332704 A CN112332704 A CN 112332704A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000005192 partition Methods 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 5
- 230000005284 excitation Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G3/00—Other motors, e.g. gravity or inertia motors
- F03G3/06—Other motors, e.g. gravity or inertia motors using pendulums
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to a self-powered monitoring rolling bearing, and belongs to the technical field of bearing monitoring and new energy. The inner cavity of the outer ring is divided into a left cavity and a right cavity by a partition plate on the inner wall of the outer ring, a circuit board and a sensor are arranged on the partition plate, and the circuit board is arranged in the left cavity; the end part of the left cavity is provided with an end cover, and the end cover presses and connects a positioning ring with an upper clamping groove and a lower clamping groove in the left cavity; an inner ring is arranged in the right cavity through the rolling body I; one end of the swing shaft is provided with a half shaft, and the other end of the swing shaft is provided with a coaxial big and small bearing blocks; an axle inclination angle exists between the inclined axis of the half axle and the horizontal axis of the small pillow block; the large boss and the small boss of the swing shaft are respectively sleeved in the inner hole of the partition plate and the inner hole of the inner ring, the large boss is connected with the inner ring, and the partition plate is arranged between the shaft shoulder and the inner ring; the swing ring is arranged on the half shaft through the rolling body II, and the swing ring swings around the axial direction of the half shaft when the half shaft rotates; the outer edge of the swinging ring is provided with a piezoelectric vibrator, the piezoelectric vibrator and the sensor are connected with the circuit board, and the free end of the piezoelectric vibrator is arranged in the upper clamping groove and the lower clamping groove of the positioning ring.
Description
Technical Field
The invention belongs to the technical field of bearing monitoring and new energy, and particularly relates to a self-powered monitoring rolling bearing.
Background
The bearing is an indispensable standard part in the fields of machinery, vehicles, aerospace, ships, energy sources and the like, and is also one of the most vulnerable parts in a related transmission system, and 30% of faults in rotary machinery are caused by bearing failure. Therefore, bearing condition monitoring and early failure diagnosis have attracted much attention. On-line monitoring gradually becomes a prerequisite guarantee for reliable operation of large bearings in the fields of generators, ships, high-speed rails, aircrafts and the like, and monitoring indexes relate to various aspects such as temperature, vibration, rotating speed, noise and the like. The early bearing monitoring system is mainly externally hung, and one of the disadvantages is that the distance between a sensor and a signal source is long, the sensor and the signal source belong to non-contact indirect measurement, and the error is large. In recent years, different forms of embedded bearing monitoring systems are proposed successively, so that the problems of measurement accuracy and accuracy are solved well, but the structure of related equipment needs to be changed so as to install a sensing monitoring system, so that the problems of stress concentration of parts of the equipment and the like are easily caused, and the embedded bearing monitoring system cannot be realized on equipment with complex structures or limited space; most importantly, when the monitoring system needs to rotate along with the inner ring and the outer ring of the bearing, power is not conveniently supplied through a wire, and the service time is short due to the fact that power is supplied by a battery. Therefore, the existing bearing monitoring system is basically a periodic and indirect non-contact measurement, and the running state of the bearing is difficult to obtain accurately in time. In view of the above, various forms of self-monitoring bearings based on magnetic coupling excitation power generation and supply have been proposed, and the biggest problems are that: the magnetic interference exists, the difference of the power generation performance is large when the rotating speed is different, the effective frequency band is narrow, the reliability is low, and the like.
Disclosure of Invention
The invention provides a self-powered monitoring rolling bearing, which adopts the following implementation scheme: the invention provides a self-powered monitoring rolling bearing which comprises an inner ring, an outer ring, a rolling body I, a pendulum shaft, a rolling body II, a pendulum ring, a pressure ring, a piezoelectric vibrator, an end cover, a sensor, a circuit board and a positioning ring, wherein the inner ring is arranged on the outer ring; the inner cavity of the outer ring is divided into a left cavity and a right cavity by the partition plate on the inner wall of the outer ring; the circuit board and the sensor are arranged on the partition board, and the circuit board is arranged in the left cavity; the end part of the left cavity is provided with an end cover through a screw, and a positioning ring with an upper clamping groove and a lower clamping groove is pressed in the left cavity through a spigot of the end cover; an inner ring is arranged in the right cavity through a rolling body I, and the rolling body I is a ball, a cylindrical roller or a tapered roller.
One end of the swing shaft is provided with a half shaft with a ring groove, the other end of the swing shaft is provided with a large pillow block and a small pillow block which are coaxial, and one side of the large pillow block, which is close to the half shaft, is provided with a shaft shoulder; the intersection point of the inclined axis of the half shaft and the horizontal axis of the small pillow block is positioned on the cross section of the half shaft where the symmetric center of the ring groove is positioned, the included angle of the inclined axis and the horizontal axis in the same plane is a shaft inclination angle, and the shaft inclination angle is an acute angle; a large pillow block and a small pillow block of the swing shaft are respectively sleeved in an inner hole of the partition plate and an inner hole of the inner ring, the large pillow block is connected with the inner ring through a screw, the large pillow block is in clearance fit with the inner hole of the partition plate, and the small pillow block is in transition fit with the inner hole of the inner ring; the baffle is arranged between the shaft shoulder and the inner ring.
The swing ring is arranged on the half shaft through a second rolling body, the second rolling body is arranged in the ring groove, and the swing ring swings around the axial direction of the half shaft when the half shaft rotates; the upper side and the lower side of the outer edge of the swinging ring are provided with piezoelectric vibrators through screws and pressure rings, and the piezoelectric vibrators and the sensor are connected with the circuit board through different lead groups. The piezoelectric vibrator is a single crystal beam formed by a substrate and piezoelectric sheets adhered to one side of the substrate, or a double crystal beam formed by the substrate and the piezoelectric sheets adhered to two sides of the substrate, and the thickness of the substrate is half of the total thickness of the piezoelectric vibrator; the free end of the piezoelectric vibrator is arranged in the upper clamping groove or the lower clamping groove of the positioning ring.
During operation, the pendulum shaft and the inner ring rotate along with the main shaft, the pendulum ring and the piezoelectric vibrator do not rotate, the pendulum shaft and the pendulum ring generate relative rotation through the second rolling body and force the pendulum ring to generate reciprocating swing along the axial direction of the half shaft, the pendulum ring further forces the piezoelectric vibrator to generate reciprocating bending deformation and convert mechanical energy into electric energy, the generated electric energy is processed through a conversion circuit on the circuit board and then is supplied to the sensor, and the sensor obtains the temperature, the rotating speed or the vibration parameters of the bearing in real time and then transmits the electric energy through a transmitting unit on the circuit board.
When the piezoelectric vibrator is a single crystal beam, the bonding surface of the substrate at the fixed end of the piezoelectric vibrator and the piezoelectric sheet is positioned on the cross section of the half shaft where the symmetric center of the ring groove is positioned; in the working process, when the swing shaft rotates to enable the left swing amount above the swing ring and the right swing amount below the swing ring to be maximum, the deformation amount of the piezoelectric vibrator is maximum; then, the swinging amount of the swinging ring and the deformation amount of the piezoelectric vibrator are gradually reduced along with the rotation of the swinging shaft, and the swinging amount of the swinging ring and the deformation amount of the piezoelectric vibrator reach the minimum when the swinging shaft rotates by 180 degrees, so that one-time complete excitation of the piezoelectric vibrator is completed; for avoiding the piezoelectric patch because of receiving too big compressive stress damage, need ensure in the working process:
the piezoelectric vibrator deforms only in a direction in which the piezoelectric sheet is subjected to a compressive stress, as follows: the substrate of the upper piezoelectric vibrator is always in contact with the left side of the upper clamping groove, and the substrate of the lower piezoelectric vibrator is always in contact with the right side wall of the lower clamping groove, so that the substrate of the upper piezoelectric vibrator and the piezoelectric sheet of the lower piezoelectric vibrator need to be installed close to the pressure ring;
the maximum deformation of the piezoelectric vibrator is smaller than the allowable value, and the minimum deformation is larger than zero, such as: the deflection of piezoelectric vibrator is less than its allowable value when the swing circle counter-clockwise swings extreme position, and the deflection of piezoelectric vibrator is greater than zero when the swing circle clockwise swings extreme position, so need make go up the draw-in groove and be located the right side of swing circle central point, lower draw-in groove is located the left side of swing circle central point, and need satisfy: RtanQ-h/cosQ is less than or equal to x and less than or equal to delta*-h-rsinQ)/cosQ, wherein: x is the axial distance between the central point of the swing ring and the side wall of the upper clamping groove or the lower clamping groove adjacent to the central point, R is the radius of the inner cavity of the positioning ring, Q is the shaft inclination angle, namely the included angle between the inclined axis of the half shaft and the horizontal axis of the small pillow block, and delta*Is an allowable amount of deformation of the piezoelectric vibrator,
h is the thickness of the substrate, beta ═ Em/Ep，EmAnd EpYoung's moduli, k, of the substrate and the piezoelectric sheet, respectively31And
respectively, the electromechanical coupling coefficient and the allowable compressive stress of the piezoelectric material, L is the length of the bendable part of the piezoelectric vibrator,
eta is a correction coefficient related to the thickness of the glue line.
When the piezoelectric vibrator is a double-crystal beam, the symmetry center of the fixed end of the piezoelectric vibrator i in the thickness direction of the substrate is positioned on the cross section of the half shaft where the symmetry center of the ring groove is positioned, namely, the symmetry center plane of the upper clamping groove and the lower clamping groove in the axial width direction coincides with the symmetry center plane of the swing ring in the width direction. In the working process, when the pendulum shaft rotates to enable the axial swinging amount of the upper side and the lower side of the pendulum ring to be maximum, the bending deformation amount of the piezoelectric vibrator is maximum, and the piezoelectric sheets on the two sides of the piezoelectric vibrator bear the maximum compressive stress and the maximum tensile stress respectively; then, the deformation of the piezoelectric vibrator and the stress borne by the piezoelectric sheets on the two sides are gradually reduced along with the rotation of the pendulum shaft, the piezoelectric vibrator is not deformed when the pendulum shaft rotates by 90 degrees, and the stress value borne by each piezoelectric sheet is zero; when the pendulum shaft further rotates, the piezoelectric vibrator reversely deforms and the deformation amount gradually increases, and when the pendulum shaft rotates 180 degrees, the swinging amount of the pendulum ring and the deformation amount of the piezoelectric vibrator reach the maximum again, so that one excitation is completed. For avoiding the piezoelectric patch because of receiving too big tensile stress damage, need ensure in the working process: the maximum deformation of the piezoelectric vibrator is less than the allowable value, i.e. (R-L) tan Q is less than or equal to delta*Wherein R is the inner cavity radius of the positioning ring, Q is the shaft inclination angle, that is, Q is the included angle between the inclined axis of the half shaft and the horizontal axis of the small pillow block, and delta*Is an allowable amount of deformation of the piezoelectric vibrator,
h is the thickness of the substrate, beta ═ Em/Ep，EmAnd EpYoung's modulus, k, of the substrate and piezoelectric sheet material, respectively31And
respectively, the electromechanical coupling coefficient and the allowable tensile stress of the piezoelectric material, L is the length of the bendable part of the piezoelectric vibrator,
eta is a correction coefficient related to the thickness of the glue line.
Advantages and features: the structure and the excitation process are simple, and no electromagnetic interference, no contact impact and no noise exist; the piezoelectric vibrators are excited in equal amplitude at each rotating speed, and the piezoelectric sheets only bear stress with controllable magnitude, so that the piezoelectric vibrator has high reliability, wide effective frequency band and strong power generation and supply capacity.
Drawings
FIG. 1 is a sectional view showing the structure of a cylindrical bearing of a single crystal piezoelectric vibrator according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the construction of a pendulum shaft according to a preferred embodiment of the present invention;
FIG. 3 is a schematic sectional view of the outer race and positioning ring of the present invention after assembly;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view of the bearing inner race of FIG. 1 rotated 180 degrees;
FIG. 6 is a sectional view of a structure of a conical bearing of a bimorph piezoelectric vibrator according to a preferred embodiment of the present invention;
FIG. 7 is a cross-sectional view of the bearing inner race of FIG. 6 rotated 90 degrees;
fig. 8 is a cross-sectional view of the bearing inner race of fig. 6 rotated 180 degrees.
Detailed Description
The invention provides a self-powered monitoring rolling bearing which comprises an inner ring a, an outer ring b, a rolling body I, a swing shaft D, a rolling body II f, a swing ring g, a pressure ring h, a piezoelectric vibrator i, an end cover j, a sensor k, a circuit board n and a positioning ring p, wherein the inner ring A is a cylindrical ring; a partition plate b1 on the inner wall of the outer ring b divides the inner cavity of the outer ring b into a left cavity b2 and a right cavity b 3; a circuit board n and a sensor k are arranged on the partition board b1, and the circuit board n is arranged in the left cavity b 2; an end cover j is installed at the end part of the left cavity b2 through a screw, and a positioning ring p with an upper clamping groove p1 and a lower clamping groove p2 is pressed in the left cavity b2 through a spigot of the end cover j; the right chamber b3 is provided with an inner ring a via a rolling element c, which is a ball, a cylindrical roller or a tapered roller.
One end of the swing shaft d is provided with a half shaft d4 with a ring groove d5, the other end of the swing shaft d is provided with a large shaft platform d2 and a small shaft platform d1 which are coaxial, and one side of the large shaft platform d2, which is close to the half shaft d4, is provided with a shaft shoulder d 3; the intersection point O of the inclined axis x2 of the half shaft d4 and the horizontal axis x1 of the small pillow block d1 is positioned on the cross section x3 of the half shaft d4 where the symmetric center of the ring groove d5 is positioned, the included angle Q between the inclined axis x2 and the horizontal axis x1 in the same plane is a shaft inclination angle, and the shaft inclination angle is an acute angle; a large shaft platform d2 and a small shaft platform d1 of the swing shaft d are respectively sleeved in an inner hole of the partition plate b1 and an inner hole of the inner ring a, the large shaft platform d2 is connected with the inner ring a through screws, the large shaft platform d2 is in clearance fit with the inner hole of the partition plate b1, and the small shaft platform d1 is in transition fit with the inner hole of the inner ring a; the partition b1 is disposed between the shoulder d3 and the inner race a.
The swing ring g is mounted on the half shaft d4 through the rolling body II f, the rolling body II f is arranged in the ring groove d5, and the swing ring g swings around the axial direction of the half shaft d4 when the half shaft d4 rotates; the upper side and the lower side of the outer edge of the swinging ring g are provided with piezoelectric vibrators i through screws and pressing rings h, and the piezoelectric vibrators i and the sensor k are connected with a circuit board n through different lead groups. The piezoelectric vibrator i is a single crystal beam formed by a substrate i1 and a piezoelectric sheet i2 adhered to one side of the substrate i, or a double crystal beam formed by a substrate i1 and a piezoelectric sheet i2 adhered to two sides of the substrate i, and the thickness of the substrate i1 is half of the total thickness of the piezoelectric vibrator i; the free end of the piezoelectric vibrator i is arranged in the upper clamping groove p1 or the lower clamping groove p2 of the positioning ring p.
In the working process, the swing shaft d and the inner ring a rotate along with the main shaft Z, the swing ring g and the piezoelectric vibrator i do not rotate, the swing shaft d and the swing ring g rotate relatively through the rolling body two f and force the swing ring g to do reciprocating swing along the axial direction of the half shaft d4, the swing ring g forces the piezoelectric vibrator i to do reciprocating bending deformation and convert mechanical energy into electric energy, the generated electric energy is processed through a conversion circuit on the circuit board n and then is supplied to the sensor k, and the sensor k obtains the temperature, the rotating speed or the vibration parameters of the bearing in real time and then emits the electric energy through an emitting unit on the circuit board n.
When the piezoelectric vibrator i is a single crystal beam, the bonding surface of the substrate i1 at the fixed end of the piezoelectric vibrator i and the piezoelectric sheet i2 is positioned on the cross section x3 of the half shaft d4 where the symmetric center of the ring groove d5 is positioned; in the working process, when the swing shaft d rotates to enable the left swing amount above the swing ring g and the right swing amount below the swing ring g to be maximum, the deformation amount of the piezoelectric vibrator i is maximum; then, the swinging amount of the swinging ring g and the deformation amount of the piezoelectric vibrator i are gradually reduced along with the rotation of the swinging shaft d, and the swinging amount of the swinging ring g and the deformation amount of the piezoelectric vibrator i reach the minimum when the swinging shaft d rotates 180 degrees, so that one-time complete excitation of the piezoelectric vibrator i is completed; in order to avoid the piezoelectric patch i2 from being damaged by excessive pressure stress, the working process needs to ensure that:
the piezoelectric vibrator i deforms only in a direction in which the piezoelectric sheet i2 is subjected to a compressive stress, as follows: the substrate i1 of the upper piezoelectric vibrator i is always in contact with the left side of the upper clamping groove p1, the substrate i1 of the lower piezoelectric vibrator i is always in contact with the right side wall of the lower clamping groove p2, and therefore the substrate i1 of the upper piezoelectric vibrator i and the piezoelectric piece i2 of the lower piezoelectric vibrator i need to be installed close to the pressing ring h; the maximum deformation of the piezoelectric vibrator i is smaller than the allowable value, and the minimum deformation is larger than zero, such as: the deflection of piezoelectric vibrator i is less than its allowable value when swing ring g anticlockwise swings extreme position, and the deflection of piezoelectric vibrator i is greater than zero when swing ring g swings extreme position clockwise, so need make last draw-in groove p1 be located the right side of swing ring g central point O, lower draw-in groove p2 be located the left side of swing ring g central point O, and need satisfy: RtanQ-h/cosQ is less than or equal to x and less than or equal to delta*-h-rsinQ)/cosQ, wherein: x is the axial distance between the central point O of the swing ring g and the side wall of the upper clamping groove p1 or the lower clamping groove p2 adjacent to the swing ring g, R is the radius of the inner cavity of the positioning ring p, Q is the shaft inclination angle, namely Q is the included angle between the inclined axis x2 of the half shaft d4 and the horizontal axis x1 of the small shaft platform d1, and delta*As the allowable amount of deformation of the piezoelectric vibrator i,
h is the thickness of the substrate i1, and β ═ Em/Ep，EmAnd EpYoung's moduli, k, of the substrate i1 and the piezoelectric sheet i2, respectively31And
respectively the electromechanical coupling coefficient and allowable compressive stress of the piezoelectric material, and L is a piezoelectric vibratorThe length of the curved portion is such that,
eta is a correction coefficient related to the thickness of the glue line.
When the piezoelectric vibrator i is a bimorph beam, the center of symmetry in the thickness direction of the substrate i1 at the fixed end of the piezoelectric vibrator i is located on the cross section x3 of the half axis d4 at which the center of symmetry of the ring groove d5 is located. In the working process, when the swing shaft d rotates to enable the axial swinging amount of the upper side and the lower side of the swing ring g to be maximum, the bending deformation amount of the piezoelectric vibrator i is maximum, and the piezoelectric sheets i2 on the two sides of the piezoelectric vibrator i bear the maximum compressive stress and the maximum tensile stress respectively; then, the deformation of the piezoelectric vibrator i and the stress borne by the piezoelectric patches i2 on the two sides are gradually reduced along with the rotation of the pendulum shaft d, when the pendulum shaft d rotates by 90 degrees, the piezoelectric vibrator i is not deformed, and the stress value borne by each piezoelectric patch i2 is zero; when the pendulum shaft d further rotates, the piezoelectric vibrator i reversely deforms and the deformation amount gradually increases, and when the pendulum shaft d rotates 180 degrees, the swing amount of the pendulum ring g and the deformation amount of the piezoelectric vibrator i reach the maximum again, so that one excitation is completed. In order to avoid the piezoelectric patch i2 from being damaged by excessive tensile stress, the working process needs to ensure that: the maximum deformation of the piezoelectric vibrator i is less than the allowable value, namely (R-L) tan Q is less than or equal to delta*Where R is the inner cavity radius of the retaining ring p and Q is the shaft inclination, i.e. Q is the angle between the inclined axis x2 of the half shaft d4 and the horizontal axis x1 of the small pillow block d1, delta*As the allowable amount of deformation of the piezoelectric vibrator i,
h is the thickness of the substrate i1, and β ═ Em/Ep，EmAnd EpYoung's moduli, k, of the materials of the substrate i1 and the piezoelectric sheet i2, respectively31And
respectively, the electromechanical coupling coefficient and the allowable tensile stress of the piezoelectric material, L is the length of the bendable part of the piezoelectric vibrator i,
eta is a correction coefficient related to the thickness of the glue line.
Claims (3)
1. The utility model provides a antifriction bearing of self-power monitoring, includes inner circle, outer lane, rolling element one, pendulum shaft, rolling element two, pendulum ring, clamping ring, piezoelectric vibrator, end cover, sensor, circuit board and holding ring, its characterized in that: the inner cavity of the outer ring is divided into a left cavity and a right cavity by a partition plate on the inner wall of the outer ring, a circuit board and a sensor are mounted on the partition plate, and the circuit board is arranged in the left cavity; the end part of the left cavity is provided with an end cover, and the end cover presses a positioning ring with an upper clamping groove and a lower clamping groove in the left cavity; an inner ring is arranged in the right cavity through the rolling body I; one end of the swing shaft is provided with a half shaft, and the other end of the swing shaft is provided with a large pillow block and a small pillow block which are coaxial; an axle inclination angle exists between the inclined axis of the half axle and the horizontal axis of the small pillow block; the large boss and the small boss of the swing shaft are respectively sleeved in the inner hole of the partition plate and the inner hole of the inner ring, the large boss is connected with the inner ring, and the partition plate is arranged between the shaft shoulder and the inner ring; the swing ring is arranged on the half shaft through the rolling body II, and the swing ring swings around the axial direction of the half shaft when the half shaft rotates; the upper side and the lower side of the outer edge of the swinging ring are provided with piezoelectric vibrators, and the piezoelectric vibrators and the sensor are connected with the circuit board through different lead groups; the piezoelectric vibrator is formed by bonding a substrate and a piezoelectric sheet, the thickness of the substrate is half of the total thickness of the piezoelectric vibrator, and the free end of the piezoelectric vibrator is arranged in an upper clamping groove or a lower clamping groove of the positioning ring.
2. Self-powered monitored rolling bearing according to claim 1, characterized in that: the piezoelectric vibrator is a single crystal beam, the bonding surface of the substrate at the fixed end of the piezoelectric vibrator and the piezoelectric sheet is positioned on the cross section of the half shaft where the symmetric center of the ring groove is positioned, the piezoelectric vibrator only deforms towards the direction of enabling the piezoelectric sheet to bear the pressure stress, the maximum deformation of the piezoelectric vibrator is smaller than the allowable value, the minimum deformation is larger than zero, and RtanQ-h/cosQ is not less than x (delta) and not more than delta*-h-RsinQ)/cosQ, wherein x is the axial distance between the center point of the swing ring and the side wall of the upper clamping groove or the lower clamping groove adjacent to the swing ring, R is the inner cavity radius of the positioning ring, Q is the shaft inclination angle, and delta*The allowable deformation amount of the piezoelectric vibrator.
3. The method of claim 1Self-powered monitoring rolling bearing, its characterized in that: the piezoelectric vibrator is a bicrystal beam, the symmetric center of the fixed end of the piezoelectric vibrator in the thickness direction of the substrate is positioned on the cross section of the half shaft where the symmetric center of the ring groove is positioned, and when the pendulum shaft rotates to enable the axial swinging amount of the upper side and the lower side of the pendulum ring to be maximum, the bending deformation amount of the piezoelectric vibrator is maximum; when the pendulum shaft rotates by 90 degrees, the piezoelectric vibrator does not deform, and when the pendulum shaft rotates by 180 degrees, the swinging amount of the pendulum ring and the deformation amount of the piezoelectric vibrator reach the maximum again; the maximum deformation of the piezoelectric vibrator is less than the allowable value, and (R-L) tan Q is less than or equal to delta*Wherein R is the inner cavity radius of the positioning ring, Q is the shaft inclination angle, delta*The allowable deformation amount of the piezoelectric vibrator.
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| CN112332704B CN112332704B (en) | 2021-10-29 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001165813A (en) * | 1999-12-10 | 2001-06-22 | Ntn Corp | Bearing device having abnormality detection function, and roll supporting device of continuous casting facility using it |
| US20020000159A1 (en) * | 2000-06-30 | 2002-01-03 | Messier-Bugatti | Axial piston pump of the type having intersecting axes |
| CN101290265A (en) * | 2008-04-28 | 2008-10-22 | 洛阳铭昊测控科技有限公司 | Railway bearing intelligent on-line detection method and its device |
| CN103986370A (en) * | 2014-05-28 | 2014-08-13 | 浙江师范大学 | High-speed cylindrical roller bearing and integrated monitoring device thereof |
| CN104632878A (en) * | 2015-01-07 | 2015-05-20 | 浙江师范大学 | Large-sized self-monitoring cylindrical roller bearing |
| CN107345540A (en) * | 2017-08-17 | 2017-11-14 | 浙江师范大学 | A kind of monitoring conical bearing certainly |
| CN110319114A (en) * | 2018-03-30 | 2019-10-11 | 比亚迪股份有限公司 | Oscillation bearing and wearable device |
| CN110912450A (en) * | 2019-05-18 | 2020-03-24 | 浙江师范大学 | Amplitude limiting excitation type low-frequency piezoelectric generator |
-
2020
- 2020-11-15 CN CN202011274383.3A patent/CN112332704B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001165813A (en) * | 1999-12-10 | 2001-06-22 | Ntn Corp | Bearing device having abnormality detection function, and roll supporting device of continuous casting facility using it |
| US20020000159A1 (en) * | 2000-06-30 | 2002-01-03 | Messier-Bugatti | Axial piston pump of the type having intersecting axes |
| CN101290265A (en) * | 2008-04-28 | 2008-10-22 | 洛阳铭昊测控科技有限公司 | Railway bearing intelligent on-line detection method and its device |
| CN103986370A (en) * | 2014-05-28 | 2014-08-13 | 浙江师范大学 | High-speed cylindrical roller bearing and integrated monitoring device thereof |
| CN104632878A (en) * | 2015-01-07 | 2015-05-20 | 浙江师范大学 | Large-sized self-monitoring cylindrical roller bearing |
| CN107345540A (en) * | 2017-08-17 | 2017-11-14 | 浙江师范大学 | A kind of monitoring conical bearing certainly |
| CN110319114A (en) * | 2018-03-30 | 2019-10-11 | 比亚迪股份有限公司 | Oscillation bearing and wearable device |
| CN110912450A (en) * | 2019-05-18 | 2020-03-24 | 浙江师范大学 | Amplitude limiting excitation type low-frequency piezoelectric generator |
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